James V. ConlanKhamphouth VongxayRichard G. JarmanRobert V. GibbonsRoss A. LuntStanley FenwickR. C.Andrew ThompsonStuart D. BlacksellMurdoch UniversityMinistry of Agriculture and ForestryArmed Forces Research Institute of Medical Sciences, ThailandCSIRO Australian Animal Health LaboratoryMahidol University2018-06-112018-06-112012-06-01American Journal of Tropical Medicine and Hygiene. Vol.86, No.6 (2012), 1077-1084000296372-s2.0-84862167826https://repository.li.mahidol.ac.th/handle/20.500.14594/14315We conducted a serologic survey of four high-priority pig-associated viral zoonoses, Japanese encephalitis virus (JEV), hepatitis E virus (HEV), Nipah virus (NiV), and swine influenza virus (SIV), in Laos. We collected blood from pigs at slaughter during May 2008-January 2009 in four northern provinces. Japanese encephalitis virus hemagglutination inhibition seroprevalence was 74.7% (95% confidence interval [CI] = 71.5-77.9%), JEV IgM seroprevalence was 2.3% (95% CI = 1.2-3.2%), and HEV seroprevalence was 21.1% (95% CI = 18.1-24.0%). Antibodies to SIV were detected in 1.8% (95% CI = 0.8-2.8%) of pigs by screening enzyme-linked immunosorbent assay, and only subtype H3N2 was detected by hemagglutination inhibition in two animals with an inconclusive enzyme-linked immunosorbent assay result. No NiV antibody-positive pigs were detected. Our evidence indicates that peak JEV and HEV transmission coincides with the start of the monsoonal wet season and poses the greatest risk for human infection. Copyright © 2012 by The American Society of Tropical Medicine and Hygiene.Mahidol UniversityImmunology and MicrobiologyMedicineArticleSCOPUS10.4269/ajtmh.2012.11-0195